a sneaky type of poo that quickly hides in the shadowy hole in the back of the toilet so that when the person who birthed that poo turns to check, it appears there is no poo whatsoever!
Belvedere Sampsonite discovered he ninjapoo in 1708 after refusing to believe that all his pushing and groaning had been for nothing.

Abe thought someone had stolen his turd but Francis said its probably a ninjapoo.

Noun 1. When any person calls another for the purpose of taking a shit on the phone without them knowing.

Noun 2. Taking a shit on the phone without their knowledge by masking unpleasant sounds with casual conversation.

1. Chris calls John on the phone, they share casual conversation. Chris needs to take a shit but does not want to pause the conversation. Chris covers loud grunting sounds as they chat committing a "ninja poo".

2. Chris and Shelly chat on the phone when the urge to shit comes upon Chris. Shelly does not give the opportunity for a break rather than shit his pants Chris masks his sounds with a strategically placed loud "I AGREE or YES PERFECT" thus committing a ninja poo.

3. A ninja poo begins with the pants doping as the cheeks touch the seat and ends when the shit covered toilet paper hits the water or when the toilet flushes if there is no paper. All actions must be preformed on the phone.